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Types ¶
type RingBuffer ¶
type RingBuffer struct {
// contains filtered or unexported fields
}
RingBuffer is a thread-safe circular byte buffer that keeps the most recent data when capacity is exceeded. Used to buffer PTY output for replay on TUI reconnect.
The backing array is allocated once at construction and never reallocated: steady-state Write is zero-allocation. (The previous implementation append-reallocated and fully recompacted on every write once full — ~768 KB of memcpy per coalesced flush per busy pane.)
func NewRingBuffer ¶
func NewRingBuffer(capacity int) *RingBuffer
NewRingBuffer creates a ring buffer with the given byte capacity.
func (*RingBuffer) Bytes ¶
func (rb *RingBuffer) Bytes() []byte
Bytes returns a copy of all buffered data.
func (*RingBuffer) Gen ¶ added in v1.18.6
func (rb *RingBuffer) Gen() uint64
Gen returns the mutation generation, monotonically increasing across Write/Reset. Equal generations guarantee identical contents.
func (*RingBuffer) Len ¶
func (rb *RingBuffer) Len() int
Len returns the current number of bytes in the buffer.
func (*RingBuffer) Reset ¶
func (rb *RingBuffer) Reset()
Reset clears all buffered data (the backing array is retained).
func (*RingBuffer) Tail ¶ added in v1.18.6
func (rb *RingBuffer) Tail(n int) []byte
Tail returns a copy of the last n bytes (all bytes when n >= Len). Replaces the "Bytes() then keep 4 KB" pattern that copied the full buffer to read an excerpt.
func (*RingBuffer) Write ¶
func (rb *RingBuffer) Write(p []byte)
Write appends p, trimming the oldest bytes when capacity is exceeded.
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